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Abstract

Coherence of an optical fiber bundle with randomly different geometries at its two ends is achieved electronically. A photosensitive array such as a Charge Coupled Device (CCD) or a Random Access Memory (RAM) is used as a sensor array to determine the addresses of the fiber at which light exits when light is sequentially directed into each consecutive fiber at the other end. The addresses are stored in a ROM and are used to provide coherence of an otherwise unordered fiber optic bundle having one end formed in a linear array, for example, and used to scan documents. More than one bit map is generated for the array of fibers by utilizing the fact that each fiber overlies a number of sensors of the sensor array. By 'exposing' the sensors of each bit map for a different exposure time a pseudo grey scale image is produced with a RAM array and extended grey scale is achieved with a CCD or other analogue imaging array.

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First Claim